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<pre><span class="sourceLineNo">001</span><a name="line.1"></a>
<span class="sourceLineNo">002</span>/*<a name="line.2"></a>
<span class="sourceLineNo">003</span> * Copyright (C) 2011 Archie L. Cobbs. All rights reserved.<a name="line.3"></a>
<span class="sourceLineNo">004</span> *<a name="line.4"></a>
<span class="sourceLineNo">005</span> * $Id: SortedValidator.html 689 2013-06-28 19:22:16Z archie.cobbs $<a name="line.5"></a>
<span class="sourceLineNo">006</span> */<a name="line.6"></a>
<span class="sourceLineNo">007</span><a name="line.7"></a>
<span class="sourceLineNo">008</span>package org.dellroad.stuff.validation;<a name="line.8"></a>
<span class="sourceLineNo">009</span><a name="line.9"></a>
<span class="sourceLineNo">010</span>import java.util.Arrays;<a name="line.10"></a>
<span class="sourceLineNo">011</span>import java.util.Collection;<a name="line.11"></a>
<span class="sourceLineNo">012</span>import java.util.Comparator;<a name="line.12"></a>
<span class="sourceLineNo">013</span>import java.util.Map;<a name="line.13"></a>
<span class="sourceLineNo">014</span><a name="line.14"></a>
<span class="sourceLineNo">015</span>import javax.validation.ConstraintValidatorContext;<a name="line.15"></a>
<span class="sourceLineNo">016</span><a name="line.16"></a>
<span class="sourceLineNo">017</span>/**<a name="line.17"></a>
<span class="sourceLineNo">018</span> * Validator for the @{@link Sorted} constraint.<a name="line.18"></a>
<span class="sourceLineNo">019</span> *<a name="line.19"></a>
<span class="sourceLineNo">020</span> * @see Sorted<a name="line.20"></a>
<span class="sourceLineNo">021</span> */<a name="line.21"></a>
<span class="sourceLineNo">022</span>public class SortedValidator extends AbstractValidator&lt;Sorted, Object&gt; {<a name="line.22"></a>
<span class="sourceLineNo">023</span><a name="line.23"></a>
<span class="sourceLineNo">024</span>    @Override<a name="line.24"></a>
<span class="sourceLineNo">025</span>    @SuppressWarnings({ "unchecked", "rawtypes" })<a name="line.25"></a>
<span class="sourceLineNo">026</span>    public boolean isValid(Object value, ConstraintValidatorContext context) {<a name="line.26"></a>
<span class="sourceLineNo">027</span><a name="line.27"></a>
<span class="sourceLineNo">028</span>        // Ignore null values<a name="line.28"></a>
<span class="sourceLineNo">029</span>        if (value == null)<a name="line.29"></a>
<span class="sourceLineNo">030</span>            return true;<a name="line.30"></a>
<span class="sourceLineNo">031</span><a name="line.31"></a>
<span class="sourceLineNo">032</span>        // Value must be an array, collection or map<a name="line.32"></a>
<span class="sourceLineNo">033</span>        Iterable&lt;?&gt; iterable;<a name="line.33"></a>
<span class="sourceLineNo">034</span>        if (value instanceof Object[])<a name="line.34"></a>
<span class="sourceLineNo">035</span>            iterable = Arrays.asList((Object[])value);<a name="line.35"></a>
<span class="sourceLineNo">036</span>        else if (value instanceof Collection)<a name="line.36"></a>
<span class="sourceLineNo">037</span>            iterable = (Collection&lt;?&gt;)value;<a name="line.37"></a>
<span class="sourceLineNo">038</span>        else if (value instanceof Map)<a name="line.38"></a>
<span class="sourceLineNo">039</span>            iterable = ((Map&lt;?, ?&gt;)value).keySet();<a name="line.39"></a>
<span class="sourceLineNo">040</span>        else {<a name="line.40"></a>
<span class="sourceLineNo">041</span>            this.setViolation(context, "@Sorted constraint only applies to non-primitive arrays, collections and maps");<a name="line.41"></a>
<span class="sourceLineNo">042</span>            return false;<a name="line.42"></a>
<span class="sourceLineNo">043</span>        }<a name="line.43"></a>
<span class="sourceLineNo">044</span><a name="line.44"></a>
<span class="sourceLineNo">045</span>        // Get comparator<a name="line.45"></a>
<span class="sourceLineNo">046</span>        Comparator comparator;<a name="line.46"></a>
<span class="sourceLineNo">047</span>        if (this.annotation.comparator() == Comparator.class) {<a name="line.47"></a>
<span class="sourceLineNo">048</span>            comparator = new Comparator() {<a name="line.48"></a>
<span class="sourceLineNo">049</span>                @Override<a name="line.49"></a>
<span class="sourceLineNo">050</span>                public int compare(Object x, Object y) {<a name="line.50"></a>
<span class="sourceLineNo">051</span>                    return ((Comparable)x).compareTo(y);<a name="line.51"></a>
<span class="sourceLineNo">052</span>                }<a name="line.52"></a>
<span class="sourceLineNo">053</span>            };<a name="line.53"></a>
<span class="sourceLineNo">054</span>        } else {<a name="line.54"></a>
<span class="sourceLineNo">055</span>            try {<a name="line.55"></a>
<span class="sourceLineNo">056</span>                comparator = this.annotation.comparator().newInstance();<a name="line.56"></a>
<span class="sourceLineNo">057</span>            } catch (Exception e) {<a name="line.57"></a>
<span class="sourceLineNo">058</span>                this.setViolation(context, "Cannot instantiate comparator for @Sorted constraint: " + e);<a name="line.58"></a>
<span class="sourceLineNo">059</span>                return false;<a name="line.59"></a>
<span class="sourceLineNo">060</span>            }<a name="line.60"></a>
<span class="sourceLineNo">061</span>        }<a name="line.61"></a>
<span class="sourceLineNo">062</span><a name="line.62"></a>
<span class="sourceLineNo">063</span>        // Check sorted-ness<a name="line.63"></a>
<span class="sourceLineNo">064</span>        Object prev = null;<a name="line.64"></a>
<span class="sourceLineNo">065</span>        int index = -1;<a name="line.65"></a>
<span class="sourceLineNo">066</span>        for (Object next : iterable) {<a name="line.66"></a>
<span class="sourceLineNo">067</span>            index++;<a name="line.67"></a>
<span class="sourceLineNo">068</span>            if (prev == null) {<a name="line.68"></a>
<span class="sourceLineNo">069</span>                prev = next;<a name="line.69"></a>
<span class="sourceLineNo">070</span>                continue;<a name="line.70"></a>
<span class="sourceLineNo">071</span>            }<a name="line.71"></a>
<span class="sourceLineNo">072</span>            if (next == null)<a name="line.72"></a>
<span class="sourceLineNo">073</span>                continue;<a name="line.73"></a>
<span class="sourceLineNo">074</span>            int diff;<a name="line.74"></a>
<span class="sourceLineNo">075</span>            try {<a name="line.75"></a>
<span class="sourceLineNo">076</span>                diff = comparator.compare(prev, next);<a name="line.76"></a>
<span class="sourceLineNo">077</span>            } catch (ClassCastException e) {<a name="line.77"></a>
<span class="sourceLineNo">078</span>                this.setViolation(context, "@Sorted constraint only applies to Comparable elements: " + e);<a name="line.78"></a>
<span class="sourceLineNo">079</span>                return false;<a name="line.79"></a>
<span class="sourceLineNo">080</span>            }<a name="line.80"></a>
<span class="sourceLineNo">081</span>            if (diff &gt; 0 || (this.annotation.strict() &amp;&amp; diff == 0)) {<a name="line.81"></a>
<span class="sourceLineNo">082</span>                this.setViolation(context, "elements are not properly sorted (mis-ordered at index " + index + ")");<a name="line.82"></a>
<span class="sourceLineNo">083</span>                return false;<a name="line.83"></a>
<span class="sourceLineNo">084</span>            }<a name="line.84"></a>
<span class="sourceLineNo">085</span>        }<a name="line.85"></a>
<span class="sourceLineNo">086</span><a name="line.86"></a>
<span class="sourceLineNo">087</span>        // Done<a name="line.87"></a>
<span class="sourceLineNo">088</span>        return true;<a name="line.88"></a>
<span class="sourceLineNo">089</span>    }<a name="line.89"></a>
<span class="sourceLineNo">090</span>}<a name="line.90"></a>
<span class="sourceLineNo">091</span><a name="line.91"></a>




























































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